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Diamond Core Bits and Countersinks
Matched core bits and countersinks for glass
A hole in glass needs its arris removed or the fixing starts a crack, so the bit and the countersink are supplied to agree. Sizes are quoted against your hole schedule.

What Diamond Core Bits and Countersinks Is For
The plant specification sheet describes this tool as used for fast and chip-free drilling work on glass. That is exactly where it belongs, and where it stops.
Diamond Core Bits and Countersinks is the whole of the Drill Bits and Countersink category, so specification work happens inside the item rather than by picking between siblings.
How It Is Built
Bond selected per enquiry
We do not ship a single general-purpose bond. Please inform your glass information, we will choose the best bonding for you.
Sizes beyond the standard list
Other sizes are available upon customer's request.
Export handling
Packed for export and shipped from Shangqiu, Henan. Give us your destination port with the enquiry.
Sizes and Item IDs
Taken from the plant specification sheets. Where a value is not published we say so rather than fill it in.
| Item ID | Diameter(mm) | Width(mm) | Length(mm) |
|---|---|---|---|
| GADBC | 5, 6, 8, 10, 12, 16, 20, 30, 40, 50, 60, 70, 80, 90, 100, 120 | 1, 2, 3 | 65, 75, 95, 105 |
- Product family
- Glass Processing
- Category
- Drill Bits and Countersink
- Bond
- Please inform your glass information, we will choose the best bonding for you.
- Country of manufacture
- China (Shangqiu, Henan)
- Private label
- Laser marking on the steel core available for OEM orders
More Views of Diamond Core Bits and Countersinks
Photographs supplied by the plant. What you see is the tool as produced, not a render.

Who It Is For
- Glass processors drilling fixings
- Shower and balustrade glass producers
- Furniture and appliance glass shops
Every one of these buyers gets the same first question from us: what material, what machine, what size.
The Problem It Solves
A hole drilled in glass either comes out clean or breaks the sheet.
Diamond Core Bits and Countersinks is the answer to that in the drill bits and countersink part of the range: matched core bits and countersinks for glass.
Used for fast and chip-free drilling work on glass.
Why This Version and Not Another
Matching core bit and countersink so the hole and the chamfer agree
Applies across the drill bits and countersink series, including this item.
Built for fast chip-free drilling work
Part of how this category is built.
Sizes to your hole schedule
Part of how this category is built.
Use Guide
Confirm the fit
Check diameter, bore and segment dimensions against the table above and against your machine.
Set the parameters
Start at the machine builder's figures for your material, then adjust feed until the cut runs quiet and the surface stays clean.
Keep it free-cutting
If the tool stops cutting and the face goes shiny, it has glazed. Dress it, then tell us — that means the bond should change.
Order by Item ID
Quote this product name and your machine on repeat orders.
Compared With the Rest of the Category
Drill Bits and Countersink holds 1 item in the programme. The difference between them is geometry and construction, not marketing.
- 10S Polishing Wheels — 10s wheels for fine grinding before polishing
- BD Polishing Wheels — bd wheels for fine glass polishing
- BK Polishing Wheels — bk wheels for first and second glass polishing
- Wool Felt Polishing Wheels — wool felt wheels for high gloss with cerium oxide
- Metal Bond Diamond Wheel for Bevelling Machine — bevelling wheels that clear grinding scraps
- Metal Bond Diamond Wheel for Double Edging Machine — double edger wheels for rough grinding and chamfering
Diamond Core Bits and Countersinks — Questions We Get Asked
What sizes does Diamond Core Bits and Countersinks come in
The standard programme lists 1 sizes on this page, Item IDs . Other sizes are available upon customer's request.
Which bond will you supply for my material
The bond is set per enquiry rather than per catalogue number. Please inform your glass information, we will choose the best bonding for you.
What do you need to quote Diamond Core Bits and Countersinks
The material you process, the machine and its power, the size and bore you need, and the quantity. With those four we quote a specification rather than a guess.
What is the lead time and minimum order for Diamond Core Bits and Countersinks
Lead time and minimum order depend on whether the size is in the standard programme or needs a production batch. Ask the sales office for this item — we do not publish a single figure that would be wrong half the time. (TBC)
Others in the Same Part of the Range

10S Polishing Wheels
10S wheels for fine grinding before polishing
View specifications →
BD Polishing Wheels
BD wheels for fine glass polishing
View specifications →
BK Polishing Wheels
BK wheels for first and second glass polishing
View specifications →
Wool Felt Polishing Wheels
Wool felt wheels for high gloss with cerium oxide
View specifications →
Metal Bond Diamond Wheel for Bevelling Machine
Bevelling wheels that clear grinding scraps
View specifications →
Metal Bond Diamond Wheel for Double Edging Machine
Double edger wheels for rough grinding and chamfering
View specifications →
Metal Bond Diamond Wheel for Special Shape Edging Machine
Shaped edging wheels for architectural and auto glass
View specifications →
Metal Bond Diamond Wheels for Straight-line Edging Machine
Rough grinding wheels for straight-line edgers
View specifications →Related Technical Guides
Get a quote for Diamond Core Bits and Countersinks
Send the material, machine and size. You will get a specification and a price, not a catalogue page.